US3072954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door closer construction
Assignee: Independent Lock Co
•
Filing: 1960-09-07
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Granted: 1963-01-15
•
Expires: 1980-09-07
Abstract
No abstract record available.
Inventors
- 👤 George P Patriquin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:37
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/02; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
147 words
A DOOR CLOSER AND DAMPER ASSEMBLY COMPRISING A CYLINDER HAVING BLEED MEANS AT ONE END, AND AN END CAP AT THE OTHER END, SAID END CAP BEING SLIDABLE WITHIN THE BORE OF SAID CYLINDER, BLOCKING MEANS ON SAID OTHER END OF SAID CYLINDER FOR RETAINING SAID CAP IN SAID BORE, A PISTON ROD SLIDABLY MOUNTED IN SAID CYLINDER WITH PORTIONS OF SAID ROD SLIDABLY EXTENDING THROUGH AN APERTURE OF SAID CAP, A PISTON HEAD ON THE INNER END OF SAID ROD, COMPRESSION SPRING MEANS INTERPOSED BETWEEN SAID CAP AND SAID HEAD TO BIAS SAID CAP AGAINST SAID BLOCKING MEANS AND SAID HEAD TOWARD SAID ONE END OF SAID CYLINDER, A HOLD OPEN PORTION ON SAID CAP, AND HOLD OPEN MEANS SLIDABLY MOUNTED ON SAID ROD TO BE SHIFTABLE INTO ENGAGEMENT WITH SAID HOLD OPEN PORTION TO SECURE SAID ROD AGAINST RELATIVE MOVEMENT WITH RESPECT TO SAID CAP.
References Cited (Backward Citations)
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Cited
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Cited
US2753958A
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US2897534A
Cited
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US2940111A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |